Isotopic composition of stable carbon and carbon dioxide concentration of atmosphere in streambeds near Tombstone, Arizona

Persistent Link:
http://hdl.handle.net/10150/191807
Title:
Isotopic composition of stable carbon and carbon dioxide concentration of atmosphere in streambeds near Tombstone, Arizona
Author:
Riddle, Jeffrey Scott.
Issue Date:
1984
Publisher:
The University of Arizona.
Rights:
Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
Abstract:
Gas samples were taken at approximately a meter deep about every 30 days for a year at three sites from ephemeral streambeds of the Walnut Gulch Watershed near Tombstone, Arizona. The streambeds are composed of sands and gravels of volcanic or granitic origin and free of vegetation. Two of the sites are underlain by a conglomeritic layer from 90 cm below streambed surface to some unknown depth. The data from these two sites had CO₂ concentration values ranging from .39% vol. to .02% vol. and δ¹³C values ranging from -9.07%. to -19.02%0. The third site has no evidence of a conglomeritic layer near the streambed surface. The CO₂ concentration values ranged from .94% vol. to .29% vol. and δ¹³C values ranged from -17.53%. to -20.75%.. All δ¹³C values are with respect to PDB. Changes of CO₂ concentration and δ¹³C values were related to flood events, physical characteristics of the streambed and banks, type of bank vegetation, season, and fractionation of ¹³C and ¹²C between gaseous CO₂ and bicarbonate. Atmospheric CO₂ contributed significantly to the streambed atmosphere following flood events; the relative importance of atmospheric CO₂ diminished as a function of the ease with which root-respired CO₂ recharged a site.
Type:
Thesis-Reproduction (electronic); text
LCSH Subjects:
Hydrology.; Radiocarbon dating.; Groundwater -- Arizona -- Cochise County -- Dating.; Groundwater -- Arizona -- Tombstone Region -- Dating.
Degree Name:
M.S.
Degree Level:
masters
Degree Program:
Hydrology and Water Resources; Graduate College
Degree Grantor:
University of Arizona
Committee Chair:
Simpson, Eugene S.

Full metadata record

DC FieldValue Language
dc.language.isoenen_US
dc.titleIsotopic composition of stable carbon and carbon dioxide concentration of atmosphere in streambeds near Tombstone, Arizonaen_US
dc.creatorRiddle, Jeffrey Scott.en_US
dc.contributor.authorRiddle, Jeffrey Scott.en_US
dc.date.issued1984en_US
dc.publisherThe University of Arizona.en_US
dc.rightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.en_US
dc.description.abstractGas samples were taken at approximately a meter deep about every 30 days for a year at three sites from ephemeral streambeds of the Walnut Gulch Watershed near Tombstone, Arizona. The streambeds are composed of sands and gravels of volcanic or granitic origin and free of vegetation. Two of the sites are underlain by a conglomeritic layer from 90 cm below streambed surface to some unknown depth. The data from these two sites had CO₂ concentration values ranging from .39% vol. to .02% vol. and δ¹³C values ranging from -9.07%. to -19.02%0. The third site has no evidence of a conglomeritic layer near the streambed surface. The CO₂ concentration values ranged from .94% vol. to .29% vol. and δ¹³C values ranged from -17.53%. to -20.75%.. All δ¹³C values are with respect to PDB. Changes of CO₂ concentration and δ¹³C values were related to flood events, physical characteristics of the streambed and banks, type of bank vegetation, season, and fractionation of ¹³C and ¹²C between gaseous CO₂ and bicarbonate. Atmospheric CO₂ contributed significantly to the streambed atmosphere following flood events; the relative importance of atmospheric CO₂ diminished as a function of the ease with which root-respired CO₂ recharged a site.en_US
dc.description.notehydrology collectionen_US
dc.typeThesis-Reproduction (electronic)en_US
dc.typetexten_US
dc.subject.lcshHydrology.en_US
dc.subject.lcshRadiocarbon dating.en_US
dc.subject.lcshGroundwater -- Arizona -- Cochise County -- Dating.en_US
dc.subject.lcshGroundwater -- Arizona -- Tombstone Region -- Dating.en_US
thesis.degree.nameM.S.en_US
thesis.degree.levelmastersen_US
thesis.degree.disciplineHydrology and Water Resourcesen_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.grantorUniversity of Arizonaen_US
dc.contributor.chairSimpson, Eugene S.en_US
dc.identifier.oclc213097388en_US
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